Two-dimensional bright solitons in dipolar Bose-Einstein condensates with tilted dipoles

Meghana Raghunandan, Chinmayee Mishra, Kazimierz Łakomy, Paolo Pedri, Luis Santos, and Rejish Nath
Phys. Rev. A 92, 013637 – Published 31 July 2015

Abstract

The effect of dipolar orientation with respect to the soliton plane on the physics of two-dimensional bright solitons in dipolar Bose-Einstein condensates is discussed. Previous studies on such a soliton involved dipoles either perpendicular or parallel to the condensate plane. The tilting angle constitutes an additional tuning parameter, which helps us to control the in-plane anisotropy of the soliton as well as provides access to previously disregarded regimes of interaction parameters for soliton stability. In addition, it can be used to drive the condensate into phonon instability without changing its interaction parameters or trap geometry. The phonon instability in a homogeneous two-dimensional condensate of tilted dipoles always features a transient stripe pattern, which eventually breaks into a metastable soliton gas. Finally, we demonstrate how a dipolar BEC in a shallow trap can eventually be turned into a self-trapped matter wave by an adiabatic approach involving the tuning of the tilting angle.

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  • Received 11 June 2015

DOI:https://doi.org/10.1103/PhysRevA.92.013637

©2015 American Physical Society

Authors & Affiliations

Meghana Raghunandan1, Chinmayee Mishra1, Kazimierz Łakomy2, Paolo Pedri3,4, Luis Santos2, and Rejish Nath1

  • 1Indian Institute of Science Education and Research, Pune 411 008, India
  • 2Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstrasse 2, DE-30167 Hannover, Germany
  • 3Université Paris 13, Sorbonne Paris Cité, Laboratoire de Physique des Lasers, F-93430 Villetaneuse, France
  • 4CNRS, UMR 7538, LPL, F-93430 Villetaneuse, France

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Vol. 92, Iss. 1 — July 2015

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